Sheet-delivery apparatus for printing-machines



(No Model.)

J. T. HAWKINS.

SHEET DELIVERY APPARATUS FOR PRINTING MACHINES.

N0. 336,109. Patented Feb. 16,1886.

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NITED STATES PATENT FFICEQ,

JOHN T. HAXVKINS, OF TAUNTON, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 336,109, dated February16, 1886.

Application filed August 24, 1885. Serial A e-175,154. (No model.)

To all whom it nmy concern;

Be itknown that 1, JOHN T. HAWKINS, of Taunton, in the county of Bristoland State of Massachusetts, have invented a new and useful Improvementin Sheet-Delivery Apparatus for Print-ing-lllachines, which invention orimprovement is fully set forth and illustrated in the followingspecification and accompanying drawings.

This invention relates more particularly to a printingpress having anoscillating cylinder fed at its bottom and delivering the sheet tailfirst from its top, or near its top, being an improvement upontheinvention described in a pending application filed by me May 6, 1885,bearing the Serial No. 164,557.

The object of the invention is to hold the sheet in contact with theimpression-cylinder of a cylinder press and prevent the sheet fromfalling away from said cylinder during its rotation, while the gripperswhich clamp the sheet to said cylinder by one edge are moving throughthat part of their path below a horizontal plane passing through theaxis of the cylinder.

The invention consists of the combinations forth in the claims.

In the accompanying drawings, Figure 1 shows a side elevation, and Fig.2 a view in plan, of such parts of an oscillating-cylinder press as areinvolved in this invention. Fig. 3 is a side view of one of the armscarrying the tape-pulleys, showing a slot in said arm for carrying anadjustable tightening and leading pulley.

In said figures the several parts are respect ively indicated bylettcrs,as follows: A Aare the main frames; 13, the impression-cylinder, made tooscillate or rotate about one revolution in each direction by mechanismomitted as not essential to this invention. 0 is the feed-board. J isthe receiving-board. D are the cylinder-grippers which take the sheetfrom the feed-board C. E is a rod secured at its ends in the frames A A.F F F are two or more curved arms secured adjustably upon the rod E bythe set-screwsf. Each of the arms F carries at each extremity a smalltapepulley, G, running upon suitable studs secured in the arms F. Nearthe central part of each of the arms F is mounted another tape pulley,g. The pulleys g rotate upon studs, which are adjustably secured in theslot 9, for the purpose of tightening the tapes 1, which run in contactwith the surface of the cylinder B and around the pulleys G g.

In Fig. 1 the cylinder is shown in position with a sheet upon it, justready to commence its retrograde or non-printing revolution, to deliverthe sheet tail first upon the stripper or fly fingers H, as fullyexplained in my pending applications, Serial Nos. 124,297 and 151,282,filed, respectively, March 15, 1884, and December 27, 1881.

The tapes t are so placed that they fall upon unprinted margins of thesheet where so de sired, and their pressure upon the sheet serves toprevent the sheet, however short,from falling away from contact with thecylinder, and insures its reaching the stripper or flyfingers H. Thefrictional contact of the sheet with the cylinder B and that of thetapes t with 1 the sheet serves to drive the tapes. The elasl ticsheet-supports Z),upon which the tail of the of parts, as hereinafterdescribed, and set 1 sheet rests, serve to keep it slightly elevatedfrom contact with the cylinder at that point. The sheet is indicated bythe letters.

The mechanism operating to open and close the grippers D and tooscillate the fly-fingers H is not shown, not being essential to thisinvention.

Having thus fully described my said im provement, as of my invention Iclaim 1. In an oscillating-cylinder printing-machine, in combinationwith an oscillatingimpression-cylinder delivering thesheet tail first,stripper-fingers, as H, for stripping the sheet from said cylinder,leadingand tighteningpul- 1eys,as G g, and a series of endless tapes, as1, running in contact with a portion of said cylinders circumference,and thence over said pulleys, whereby the sheets are delivered to andupon said stripper-fingers, substantially as and for the purposes setforth.

2. In an osciHating-cylinder printing-machine delivering the sheet fromits impression cylinder tail first, in combination with said cylinder,leading and tightening pulleys, as Gg, a series of endless tapes, as t,running in contact with a portion of the circumferenee of said cylinderand thence over said pulleys, elastic sheet-supports, as b, andstripper-fingers, as H, all arranged and operating substantially asdescribed, whereby sheets of varying sizes are held in frictionalcontact with the surface of said cylinder during its delivery rotationand the delivery of said ro sheets upon said stripper-fingers insured,substantially as and for the purposes set forth. JOHN T. HAWKINS.VVit-nesses:

ELISHA T. JAoKs0N, J. F. HALEY.

